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RF Loop test fault in Ericsson RBS2206

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  • #57601 Reply
    Khalid
    Guest

    Hi Gents, i am having intermittent alarm, RF Loop test fault and degraded RX on sector -A 900. I have changed dTRUs, CDU, CXU, DXU, dTRU backplane, Y-Link cables and TX/RX cables but alarm still raising at same sector. i also installed new IDB. Can any one help me in this regards,
    Thanks

    #57602 Reply
    msatria
    Guest

    have you check the VSWR ?

    #57603 Reply
    Khalid
    Guest

    yes VSWR is OK, i swaped the feeders and even antennas but always alarm stays at sector A.

    #57604 Reply
    msatria
    Guest

    its occoured on the same DTRU..?

    #57605 Reply
    Khalid
    Guest

    yes on same TRXs 0,1,2,3

    #57606 Reply
    jamil
    Guest

    sweep the 2 feeder that going to cell A and but them in cell B in the rbs if its still gave u alarm rf loop at cell A that means u have problem in the cabinet if it move to cell B that means u have problem from the jumper to antenna you must trace them to see may be sweep from up on go to antenna A and another to B-OR C

    #57607 Reply
    Maxime
    Guest

    Khalid, try to permut the antennas for the two sectors to see. or permut the feeders for the 2 sectors,i mean put the feedor sectorA on the antennaB and the feedor sectorB on the antennasA and tell me the result.

    #57608 Reply
    kHALID
    Guest

    hI jAMIL/mAXIME, i already swaped the feeders with sector B but alarm still stays in sector A. Problem is not in antenna system but within the cabinet. Is there any issue related to E1 in this case. Thanks

    #57609 Reply
    jamil
    Guest

    The cabinet is 2206 just sweep the dtru from sector 0 to sector 4 and 1to 5 with the rx cable and see what happaned

    #57610 Reply
    Khalid
    Guest

    Dear Jamil, i have already conducted all these tests. swaped dTRUs with sector C, swaped the CDU with sector B, swaped the RX cables with sector-B. replaced the CXU but always alarm comes in sector-A.

    #57611 Reply
    jamil
    Guest

    Its internal fault in the 2206 in the inside board of rbs so batter to change it

    #57612 Reply
    khalid
    Guest

    brother i told u that alreay i changed dtru backplane board alongwith y-link cables. thanks

    #57613 Reply
    Khalid
    Guest

    any assistance from u guys.

    #57614 Reply
    mushtaq
    Guest

    check your tx and rx cables in the rbs

    #57615 Reply
    Khlid
    Guest

    already checked/swaped TX/RX cables.

Viewing 15 posts - 1 through 15 (of 31 total)
Reply To: RF Loop test fault in Ericsson RBS2206
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